My wife and I used YouRoam while we were traveling in Italy this summer, and it was great knowing that when we both were checking in with family and work while over there that the cost was not going to be astronomical. Fantastic app and even better savings over the cost of typical carrier roaming fees!
These guys have finally figured it out. Finally those of us who don't have a generous corporate employer that picks up our ridiculous $1000+ phone bills after overseas trips can stay connected whilst abroad. I have used it on 4 trips so far and it works like a treat.
The market opportunity here is massive. And with the team they have behind them, I believe YouRoam is going to go far. Quickly.